Sequence+Trigger实现Oracle列自增 序列的语法格式为: CREATE SEQUENCE 序列名 [INCREMENT BY n] [START WITH n] [{MAXVALUE/MINVALUE n|NOMAXVALUE}] [{CYCLE|NOCYCLE}] [{CACHE n|NOCACHE}]; INCREMENT BY 用于定义序列的步长,如果省略,则默认为1,如果出现负值,则代表序列的值是按照此步长递减的. START WITH 定义Oracle序列的初始值(即…

Oracle列自增-Identity Columns in Oracle Database 12c Release 1 (12.1) 在ORACLE 12C以前的版本中,如果要实现列自增长,需要通过序列+触发器实现,到了12C ORACLE 引进了Identity Columns新特性,从而实现了列自增长功能. 一.Identity Columns使用语法 GENERATED [ ALWAYS | BY DEFAULT [ ON NULL ] ] AS IDENTITY [ ( identity…

I wrote this trigger around 4 years ago to handle errors in an application based on Oracle Forms 6i. This trigger handles all errors with some custom messages for some specific errors and not only this after giving an appropriate message to the user…

Pre-Query trigger in Oracle D2k / Oracle Forms DescriptionFires during Execute Query or Count Query processing, just before Form Builder constructs and issuesthe SELECT statement to identify rows that match the query criteria.Definition Level form or…

Post-Form trigger in Oracle Forms fires during the Leave the Form process, when a form is exited.   You can use Post-Form trigger for the tasks such as: To clean up the form before exiting. For example, use a Post-Form trigger to erase any global var…

Pre-Form trigger in Oracle Forms fires during the form start-up, before forms navigates to the first navigable data block of that form. Use a Pre-Form trigger to perform the tasks such as maximize the forms_mdi_window, initialize some Global variable…

在ORACLE中给表.列添加凝视以及读取凝视 1.给表填加凝视:SQL>comment on table 表名 is '表凝视"; 2.给列加凝视:SQL>comment on column 表.列 is '列凝视'; 3.读取表凝视:SQL>select * from user_tab_comments where comments is not null; 4.读取列凝视:SQL>select * from user_col_commnents where comme…

I have written many posts related to triggers in Oracle Forms, I have given examples for Form Level triggers, Data Block Level triggers and Item Level Triggers. And in this tutorial I am just giving the simple tutorial to how to create a trigger in O…

https://www.cnblogs.com/mmlw/p/5808072.html org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='pxh', mode=IN, javaType=class java.lang.…

oracle ogg 单实例双向复制搭建(oracle-oracle)--Oracle GoldenGate --继昨天的测试,这一篇实施单实例双向复制(完全重新搭建) --环境不变 db1,db2(单实例)10.1*.1*orcl,oggcentos 6.5,centos 6.511.2.0.4,11.2.0.4 1 检查归档,日志模式(orcl,ogg) SCOTT@ orcl >conn / as sysdba Connected. SYS@ orcl >select NAME,OPEN…